cut
copy
paste
delete
"cut" cuts out the highlighted text ready for you to paste(put it back somewhere else) it
"copy" copies the hightlighted text(but leave the original there) ready for you to paste it
"paste" puts the copied or cut highlighted text to the place you want to see that text at, for example in an email or a word document
"delete" just deletes the highlighted text
Anyway, sorry that my post 5 seemed hard to you, hope this helps